Table 16. 450 watts Power supply LED
LED Description
1 Power output LED
(green)
• Green: The server is on and the power supply is working normally.
• Blinking green: The power supply is in zero-output mode (standby). When the server
power load is low, one of the installed power supplies enters into the standby state
while the other one delivers entire load. When the power load increases, the standby
power supply will switch to active state to provide sufficient power to the server.
To disable zero-output mode, start the Setup utility, go to System Settings ➙ Power
➙ Zero Output and select Disable. If you disable zero-output mode, both power
supplies will be in the active state.
• Off: The power supply has failed or not connected from the ac power source or a
power problem occurs. To resolve the issue, check the power cord and the input
voltage. If the problem still recurs, replace the power supply.
System-board LEDs
The following illustration indicates the light-emitting diodes (LEDs) on the system board.
Figure 134. System-board LEDs
Table 17. System-board LEDs
1 Rear identification LED (blue) 2 System error LED (amber)
Chapter 5. Problem determination 145
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